About storage extraction and type conversion of data in Cocos2d-x

1. Obtain the variable stored in the Userdefault, but the obtained variable is a string type value, to be converted to an integer with the Atoi function, but the Atoi function's pass parameter is a char* type value, so with _score.c_str () Convert String to char*

Auto Userdefault = Userdefault::getinstance ();
Auto _score = Userdefault->getstringforkey ("Rewardscore");
_rewardscore = Atoi (_score.c_str ());
_rewardscore = _rewardscore + 10;

2. The data is stored in the Userdefault, but the integer _rewardscore must first be converted into a character type variable, sprintf function can be used to store the transformation.

Char score_str[100] = {0};
sprintf (Score_str, "%d", _rewardscore);
Userdefault->setstringforkey ("Rewardscore", score_str);

About storage extraction and type conversion of data in Cocos2d-x